Ahhhh. Sussed the 77 thing. It's Robert Lutece, filming the sunset, hummingbirds, and his eventual death as somebody pushes him. It's his note in the opening with the warning too.

Godammit.

Next, it's the boards of photos in the "Our Lady Elizabeth" room, labelled Heretic, Pacifist etc.
Seems to hint that certain characters reappear, especially one gent from the beach who becomes a Handyman ?